Repairing Large Cracks In Concrete Porch

The first part of repairing the cement slab is to seal any cracks to prevent them from spreading up into the new layer of concrete that you will use to level the surface.

Repairing large cracks in concrete porch.

You will need a tube of vinyl concrete patching material a wet rag a soft bristle brush and a wire brush. Fill the crack with patching mix also know as vinyl concrete step 4. Pack a small amount of anchoring cement. Clean out the debris with a stiff fiber or wire brush.

This helps the repair material to key into the crack creating a mechanical bond in addition to the chemical bond between the patch material and the concrete. Wet the surface and apply a concrete bonding agent. Prepare the cracked. How to repair wide concrete cracks.

The secret to fixing wide concrete cracks is to undercut the sides of the crack to give it an inverted v shape. This last option works best to fill large cracks or chipped edges while the other products are suitable for cracks in concrete that are inch wide or narrower. Concrete cracks cannot be patched with concrete since concrete contains aggregate rock pieces that are too large to fit in cracks. A shop vacuum is also helpful for completely removing dirt dust and loose debris.

Using a chisel make the crack wider at the bottom than the top.